Update appearance of invalid textfields in Harmony.

ui/views/controls/focus_ring.cc

Index: ui/views/controls/focus_ring.cc
diff --git a/ui/views/controls/focus_ring.cc b/ui/views/controls/focus_ring.cc
index 8e1702b37884dbb2114351b7c52591ba9da9fde7..59e97f7838a31ae786f179693cd74af000afa1ac 100644
--- a/ui/views/controls/focus_ring.cc
+++ b/ui/views/controls/focus_ring.cc
@@ -21,6 +21,15 @@ constexpr float kFocusHaloThicknessDp = 2.f;
 constexpr float kFocusHaloCornerRadiusDp =
     FocusableBorder::kCornerRadiusDp + kFocusHaloThicknessDp / 2.f;
 
+FocusRing* GetFocusRing(views::View* parent) {
+  for (int i = 0; i < parent->child_count(); ++i) {
+    if (parent->child_at(i)->GetClassName() == FocusRing::kViewClassName)
+      return static_cast<FocusRing*>(parent->child_at(i));
+  }
+  NOTREACHED();
+  return nullptr;
+}
+
 }  // namespace
 
 const char FocusRing::kViewClassName[] = "FocusRing";
@@ -35,13 +44,16 @@ void FocusRing::Install(views::View* parent) {
 
 // static
 void FocusRing::Uninstall(views::View* parent) {
-  for (int i = 0; i < parent->child_count(); ++i) {
-    if (parent->child_at(i)->GetClassName() == kViewClassName) {
-      delete parent->child_at(i);
-      return;
-    }
-  }
-  NOTREACHED();
+  delete GetFocusRing(parent);
+}
+
+// static
+void FocusRing::SetColorId(
+    views::View* parent,
+    const base::Optional<ui::NativeTheme::ColorId>& override_color_id) {
+  FocusRing* ring = GetFocusRing(parent);
+  ring->override_color_id_ = override_color_id;
+  ring->SchedulePaint();
 }
 
 const char* FocusRing::GetClassName() const {
@@ -63,9 +75,11 @@ void FocusRing::Layout() {
 void FocusRing::OnPaint(gfx::Canvas* canvas) {
   SkPaint paint;
   paint.setAntiAlias(true);
-  paint.setColor(SkColorSetA(GetNativeTheme()->GetSystemColor(
-                                 ui::NativeTheme::kColorId_FocusedBorderColor),
-                             0x66));
+  paint.setColor(SkColorSetA(
+      GetNativeTheme()->GetSystemColor(
+          override_color_id_ ? *override_color_id_
+                             : ui::NativeTheme::kColorId_FocusedBorderColor),
+      0x66));
   paint.setStyle(SkPaint::kStroke_Style);
   paint.setStrokeWidth(kFocusHaloThicknessDp);
   gfx::RectF rect(GetLocalBounds());